How to Set Up Sonos One as Surrounds
If you want a simple way to add immersive rear audio to a Sonos home theater, learning how to set up Sonos One as surrounds is one of the most useful upgrades you can make.
The process is straightforward, but a few setup details determine whether you get balanced, room-filling surround sound or an underwhelming result.
Sonos One and Sonos One SL speakers can be bonded as rear surrounds with a compatible Sonos soundbar, creating a wireless 5.1-style setup for movies, TV, and games.
What you need before you start
Before you begin, confirm that your system supports surround pairing.
Sonos uses a software-based home theater architecture, so the surrounds must be added to a compatible “home theater room” rather than used as standalone stereo speakers.
- A compatible Sonos soundbar, such as Sonos Arc, Arc Ultra, Beam (Gen 1 or Gen 2), or Ray
- Two Sonos One speakers, or one Sonos One and one Sonos One SL
- The Sonos app on iOS or Android
- A stable Wi-Fi network
- A TV or streaming device connected to the soundbar
For best results, both rear speakers should be the same model.
Sonos also recommends that the speakers be on the same Sonos system and updated to the latest software.
Where should you place Sonos One surrounds?
Speaker placement has a bigger impact than many people expect.
Rear surrounds should sit slightly behind and to the sides of the main listening position, not directly beside the soundbar.
Recommended placement tips
- Place each speaker behind your seating area, ideally at ear level or slightly above
- Keep the speakers at equal distance from the main listening spot
- Angle them toward the center of the room if possible
- Avoid enclosing them inside cabinets or tight shelves
- Keep them clear of walls or large objects that block sound
If the room is small, even modest changes in placement can improve surround imaging.
In larger rooms, mounting the speakers on stands or wall brackets often creates a cleaner rear sound field.
How to set up Sonos One as surrounds in the Sonos app
The actual bonding process is done through the Sonos app.
Once the speakers are added to your system, you assign them to an existing soundbar room as surround speakers.
Step-by-step setup
- Open the Sonos app and make sure your soundbar is already set up and working.
- Verify that both Sonos One speakers are powered on and connected to the same system.
- In the app, go to Settings and select the room with your soundbar.
- Choose Add Surrounds or the equivalent surround setup option.
- Select the two Sonos One speakers you want to use as rear channels.
- Follow the prompts to confirm the left and right surround assignment.
- Complete any room tuning or Trueplay steps if your device supports them.
Once the setup is complete, the Sonos One speakers stop functioning as independent stereo speakers and instead become part of the home theater room.
Audio from the TV will then be distributed by the soundbar and surrounds automatically.
What happens after the speakers are added?
After you bond the speakers, the Sonos system manages surround audio in the background.
TV audio is handled differently from music playback, and that distinction matters for expectations.
TV and movie playback
For movies and TV, the soundbar handles the front soundstage, dialogue, and center information, while the Sonos One surrounds deliver rear channel effects and ambient detail.
If the source content includes Dolby Digital 5.1 or another surround format supported by your soundbar, the experience becomes noticeably more immersive.
Music playback
When streaming music to a surround setup, Sonos can play in several modes depending on the source and app settings.
In many cases, the surrounds contribute ambient rear audio rather than acting like a traditional stereo pair.
This is why setup intent matters: Sonos One speakers used as surrounds are optimized for home theater, not for sitting separately across a room as a general-purpose stereo system.
How do you tune the surround experience?
Sonos gives you a few controls to tailor the sound.
These settings are useful after you have confirmed the speakers are correctly bonded.
- Surround level: Raises or lowers the rear speaker volume
- TV level: Adjusts overall room balance in some configurations
- Trueplay tuning: Calibrates audio to your room’s acoustics using an iPhone or iPad
If the surrounds feel too loud, start by lowering the surround level rather than changing placement immediately.
If the sound feels thin or uneven, run Trueplay tuning again after moving furniture, changing speaker position, or adding stands.
Common problems when setting up Sonos One as surrounds
Most surround setup issues are caused by network problems, incompatible rooms, or speakers that are not fully updated.
A quick checklist often resolves the issue.
Why don’t the speakers appear in the app?
If one or both Sonos One speakers do not show up during setup, check that they are powered on, connected to Wi-Fi, and not assigned to another room.
Restarting the app, the speakers, and the router can help when discovery fails.
Why does the app say the room is incompatible?
This usually means the soundbar is not a supported model or the speakers are already bonded in another setup.
Surrounds must be assigned to a home theater room with a compatible Sonos soundbar.
Why is the surround sound weak?
Weak surround output is often related to placement, low surround level settings, or content that is not actually encoded in surround sound.
Test with a known 5.1 movie or streaming title before assuming the hardware is at fault.
Why is audio out of sync?
Sonos is designed to keep TV audio tightly synchronized, but HDMI ARC, eARC, or optical issues can still create delays.
Confirm your TV audio output settings, use the correct cable, and make sure the soundbar is receiving the proper format.
Best practices for a better Sonos surround setup
Once the system is working, a few practical adjustments can improve day-to-day performance.
- Use matching Sonos One speakers for symmetry
- Keep both speakers at similar height and distance from the seating area
- Run Trueplay after final placement
- Test multiple movie scenes, not just one clip
- Check TV audio settings for passthrough or bitstream output where appropriate
- Update all Sonos components before troubleshooting
If you live in a multiuse space, consider speaker stands that let you position the surrounds accurately without permanent wall mounting.
This is often the easiest way to optimize room acoustics without remodeling.
When should you choose Sonos One SL instead?
Sonos One SL can also be used as a surround speaker in the same way as Sonos One.
The main difference is that the One SL does not include built-in microphones for voice assistants.
That makes the One SL a good choice if you only care about rear-channel performance and want a slightly simpler hardware package.
For surround duty, audio behavior is effectively the same in a properly configured Sonos home theater system.
How to verify the setup is working correctly
After setup, use a controlled test to confirm that the rear speakers are active and properly assigned.
- Play a Dolby Digital 5.1 movie or TV show
- Stand near each rear speaker to hear directional effects
- Use the Sonos app to confirm the room shows a bonded home theater setup
- Adjust surround level and re-test if the effect is too subtle or too aggressive
If the surrounds are configured correctly, you should notice spatial effects during action scenes, crowd ambience, and music-heavy sequences that sound wider and more enveloping than the soundbar alone.